Radon volumetric activity and ion production in the undisturbed lower atmosphere: Ground-based observations and numerical modeling

Anisimov, S. V.; Galichenko, S. V.; Aphinogenov, K. V.; Makrushin, A. P.; Shikhova, N. M.

doi:10.1134/s1069351317010037

Cited by 20 publications

(4 citation statements)

References 49 publications

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“…Firstly, we can eliminate a term ∂A/∂t from (1), because a thoron lifetime is much less than a diffusion time scale. So a time t can be considered as a parameter in a boundary problem (1)(2)(3)(4). Secondly, we can eliminate KM from the equations in region z > z0, because a molecular diffusion coefficient is much less than a turbulent one.…”

Section: Atmosphere Thoron Transport Modelingmentioning

confidence: 99%

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Variability of thoron distribution in the surface atmosphere at Borok Geophysical Observatory

Anisimov

Dmitriev²,

Aphinogenov³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The variability of radon-220 (thoron) distribution in the surface atmosphere is investigated by mathematical modeling of thoron turbulent transport, based on the data of continuous field natural observations at Borok Geophysical Observatory (Central Russia). The thoron flux from the surface was set according to the observations. Variations of turbulent diffusion coefficient altitude profiles were calculated by the observations of wind velocity pulsations at two altitudes made synchronously on the same location. The altitude profiles of thoron volumetric activity typical for the atmospheric surface layer are estimated. It is shown that the thoron volumetric activities at any altitudes vary concurrently, but the largest thoron volumetric activity, as well as its gradient, occurs below 0.5 m at nighttime.

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Section: Atmosphere Thoron Transport Modelingmentioning

confidence: 99%

“…Radon isotopes 222 Rn and 220 Rn (thoron) make the main contribution to the surface atmosphere ionization over the land under natural conditions [1][2][3]. Natural radon isotopes are noble radioactive gases escaped from minerals into pore space of rocks and soil and then transported to the atmosphere by diffusion and advection [4,5].…”

Section: Introductionmentioning

confidence: 99%

Variability of thoron distribution in the surface atmosphere at Borok Geophysical Observatory

Anisimov

Dmitriev²,

Aphinogenov³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The data after subtracting the background is fitted with the nonlinear fitting function GaussAmp in the Origin function drawing software, and the result is shown in figure 2. It can be seen that the energy spectrum after subtracting background fitting can clearly strip out the characteristic peaks of radon and its daughters [13][14][15].…”

Section: Data Processingmentioning

confidence: 99%

Study on the Decay Law of γ Energy Spectrum of Radon and Its Daughters in Radon Chamber

Yunrui¹,

Wanchang²,

Guanhua³

et al. 2021

IJEPE

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Radon is one kind of radioactive gas which mainly distributed in soil and rocks, because of its strong upward migration ability, it is easy to diffuse into the air and cause radiation damage as the respiratory system enters the human body, which may cause lung cancer. Accurate measurement of concentration has always been a research area that has attracted much attention. There are various methods for measuring radon. Commonly used at home and abroad are thermoluminescence radon method, solid nuclear track radon method, activated carbon method, electret method, and scintillation chamber method. It is qualified for measurement under normal conditions, but in special applications such as the deduction of radon background in aerial gamma measurement, the above method is no longer applicable. At present, the detectors used in aviation gamma instruments at home and abroad are mainly large crystal sodium iodide detectors. The high-resolution array detector aviation gamma spectrometer developed by Ge Liangquan of Chengdu University of Technology also uses this kind of detection. In order to explore the effect of the detector on the direct measurement of the gamma energy spectrum of radon and its daughters. An experimental platform was built based on the HD-6 multifunctional automatic control radon chamber, the large crystal NaI(Tl) detector was used for measurement, and the HPGe detector was used for comparative measurement. Finally, the measurement results of the two were measured with the RAD7 radon meter. The obtained radon concentration was compared, and the reason for the abnormal data was studied. Through experiments, the large crystal NaI(Tl) detector can be applied to the direct measurement of the γ energy spectrum of radon and its daughters, and its practical effect is better than that of the electric cooling HPGe detector. The experiment found that the temperature is The count rate of the large crystal NaI(Tl) detector cannot be ignored, and temperature correction is required.

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“…The main sources of ion formation are cosmic gamma radiation and gamma radiation resulting from the radioactive decay of such elements as radon [14][15][16]. Cosmic-ray ionization occurs throughout the troposphere and dominates over the seas and oceans, while radon isotopes determine the mode of ions in the surface air layer over land [17].…”

Section: Introductionmentioning

confidence: 99%

Correlation between the Concentrations of Atmospheric Ions and Radon as Judged from Measurements at the Fonovaya Observatory

et al. 2022

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The correlation between the radon influx into the atmosphere and the formation of ions has been studied from the data of observations at the Fonovaya Observatory of Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences. This correlation is shown to be stable in the period from October to January. In the other months, the correlation is disturbed. However, if the events of nucleation and lightning discharges are removed from the data set, then the correlation is kept throughout the year.

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Radon volumetric activity and ion production in the undisturbed lower atmosphere: Ground-based observations and numerical modeling

Cited by 20 publications

References 49 publications

Variability of thoron distribution in the surface atmosphere at Borok Geophysical Observatory

Variability of thoron distribution in the surface atmosphere at Borok Geophysical Observatory

Study on the Decay Law of γ Energy Spectrum of Radon and Its Daughters in Radon Chamber

Correlation between the Concentrations of Atmospheric Ions and Radon as Judged from Measurements at the Fonovaya Observatory

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